Three Phase Induction Motors
Reduced voltage starter can be used with

Squirrel cage as well as slip ring induction motor
Squirrel cage induction motor only but not with slip ring motor
Slip ring motor only but not with squirrel cage induction motor
None of these

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Three Phase Induction Motors
Slip of an induction motor is negative when

Magnetic field and rotor rotate in opposite direction
Rotor speed is more than the synchronous speed of the field and are in the same direction
Rotor speed is less than the synchronous speed of the field and are in the same direction
None of these

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